摘要
以HCHO为还原剂,使用2步法制备银-铜复合材料。以苯酚为探针,该催化剂在臭氧化降解苯酚过程中有极好的活性。臭氧分解实验结果表明,催化剂的活性与其分解臭氧的能力正相关,说明催化剂和臭氧之间的相互作用对臭氧臭氧化降解苯酚很关键。以原子吸收光谱、X射线衍射仪和催化活性测试结果表明,银-铜复合材料中还原态的Cu、Ag和Cu2O更易于与臭氧互相作用。在臭氧和催化剂相互作用过程中产生的铜氧化物和银氧化物可以氧化苯酚降解产物,这个过程会促进苯酚降解的程度。此外,合成原料中加入的HCHO溶液和银离子有利于催化剂的稳固,降低离子的沥出量。
A sliver-copper composite was prepared by a two-step method by using HCHO as reductant. This catalyst exhibited good performance in catalytic ozonation with phenol as a probe. Ozone consumption experiment revealed that activity of catalyst was positive correlated with its ability in decomposing ozone. And the interaction between the catalyst and ozone was a crucial factor in catalytic ozonation of phenol. Analysis with AAS, XRD and catalytic activity results showed that the deoxidized Cu, Ag, and Cu2 O in sliver-copper composite might be more easily attracted to ozone. The deoxidized byproduct could be oxidized by the copper oxide and silver oxide produced during the interaction between the catalyst and ozone. This could promote the depth of the phenol degradation. In addition, the existence of HCHO and silver ions in raw materials was beneficial to the fastness of the catalyst.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第11期65-69,74,共6页
Technology of Water Treatment
基金
国家自然科学基金(20903048)
关键词
催化臭氧化
水处理
协同效应
反应机理
catalytic ozonation
water treatment
synergistic effect
reaction mechanism
